Switched linear control of vapor compression systems under highly transient conditions

Herschel Pangborn, Andrew G. Alleyne

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Vapor compression systems, while historically prevalent in relatively steady-state thermal transport applications, are recently being investigated for application in modern advanced vehicle systems, where far greater transient operational conditions are expected to occur. Critical to the control of these systems is the regulation of evaporator superheat, which is known to exhibit highly nonlinear behavior, especially at low values. This behavior includes a reversal of signs in the input-to-output gains between operating conditions with zero superheat and those with positive superheat. As an alternative to addressing the system's nonlinear response with nonlinear control, this paper demonstrates the use of a switched linear control approach. This is implemented by switching among linear model-based controllers for distinct modes of the system. This principle of matching modes of the controller to modes of the system is demonstrated in simulation for an evaporator superheat recovery process. The control design is shown to regulate the system on a timescale suitable for the transients expected of application in advanced mobile energy systems.

Original languageEnglish (US)
Title of host publication2016 American Control Conference, ACC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages543-548
Number of pages6
ISBN (Electronic)9781467386821
DOIs
StatePublished - Jul 28 2016
Event2016 American Control Conference, ACC 2016 - Boston, United States
Duration: Jul 6 2016Jul 8 2016

Publication series

NameProceedings of the American Control Conference
Volume2016-July
ISSN (Print)0743-1619

Other

Other2016 American Control Conference, ACC 2016
CountryUnited States
CityBoston
Period7/6/167/8/16

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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    Pangborn, H., & Alleyne, A. G. (2016). Switched linear control of vapor compression systems under highly transient conditions. In 2016 American Control Conference, ACC 2016 (pp. 543-548). [7524970] (Proceedings of the American Control Conference; Vol. 2016-July). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ACC.2016.7524970